RT9045GSP

{
  "schema_version": 1,
  "type": "component",
  "slug": "rt9045gsp",
  "title": "RT9045GSP",
  "brief": "Richtek Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOIC-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "pmic",
    "rt9045gsp"
  ],
  "component": {
    "mpn": "RT9045GSP",
    "manufacturer": "Richtek Tech",
    "package": "SOIC-8",
    "pin_count": 9,
    "category": "PMIC",
    "subcategory": "Voltage Regulators - Linear, Low Drop Out (LDO) Regulators",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205121430_Richtek-Tech-RT9045GSP_C425782.pdf",
    "parts": {
      "symbol": "rt9045gsp.kicad_sym",
      "footprint": "rt9045gsp.kicad_mod",
      "model_3d": "rt9045gsp-etched.glb",
      "model_3d_plain": "rt9045gsp.glb",
      "model_3d_step": "rt9045gsp-etched.step",
      "model_3d_step_plain": "rt9045gsp.step",
      "lbr": "rt9045gsp.lbr"
    },
    "distributor_links": {
      "lcsc": "C425782"
    },
    "pins": [
      {
        "number": "1",
        "name": "VIN",
        "type": "power_in",
        "description": "Input voltage supplying current to the output pin (1V to 5.5V recommended, absolute max 6V). Must be kept lower or equal to VCNTL. Decouple with a large low-ESR ceramic capacitor (typ. 10µF) placed close to the pin."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground. Shared with the exposed pad, which must be soldered to a large PCB copper area connected to GND for maximum power dissipation."
      },
      {
        "number": "3",
        "name": "REFEN",
        "type": "input",
        "description": "Reference voltage input and active-low shutdown control pin. Two resistors divide VIN on this pin to program the regulated output voltage (V_OUT = V_REFEN). Pulling this pin to ground (V_REFEN < 0.15V) shuts down the device; typical drive uses an open-drain N-MOSFET such as 2N7002."
      },
      {
        "number": "4",
        "name": "VOUT",
        "type": "power_out",
        "description": "Regulator output, regulated to the REFEN voltage to terminate the DDR bus resistors. Capable of sinking and sourcing up to 1.8A. Requires typ. 10µF ceramic output capacitance to maintain large-signal transient response."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection. Leave floating or tie to GND."
      },
      {
        "number": "6",
        "name": "VCNTL",
        "type": "power_in",
        "description": "Control/bias supply for internal control circuitry and gate drive to the output power MOSFETs (5V ±5%). Output current drive capability is proportional to VCNTL. Decouple with at least 1µF to GND; VIN must be kept ≤ VCNTL."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection. Leave floating or tie to GND."
      },
      {
        "number": "8",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection. Leave floating or tie to GND."
      },
      {
        "number": "9",
        "name": "GND (Exposed Pad)",
        "type": "power_in",
        "description": "Exposed thermal pad on the package underside. Must be soldered to a large PCB copper area connected to GND for proper heat sinking and rated power dissipation (2.51W at TA=25°C, θJA=39.8°C/W)."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2205121430_Richtek-Tech-RT9045GSP_C425782.pdf",
        "pages": 11,
        "sha256": "ecb44d14a5f14751",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 9,
        "described": 9,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -1.905
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-8_3.9x4.9mm_P1.27mm@sha256:074ecb2092b24fa4",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "rt9045gsp.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "rt9045gsp-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "2e4b50880e0153b5cb08f05b378b4e705aa8674336d36f939f5721f21742ca2b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Richtek Tech",
      "Package": "SOIC-8",
      "Category": "PMIC",
      "Pins": "9"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "ecb44d14a5f14751",
      "rows": [
        {
          "name": "VCNTL Operation Current",
          "symbol": "ICNTL",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.7,
          "max": 2.5,
          "conditions": "IOUT = 0A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Standby Current",
          "symbol": "ISTBY",
          "kind": "electrical",
          "unit": "A",
          "min": null,
          "typ": 20,
          "max": 90,
          "conditions": "VREFEN ≤ 0.2V (Shutdown), RLOAD = 180",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Offset Voltage",
          "symbol": "VOS",
          "kind": "electrical",
          "unit": "mV",
          "min": 13,
          "typ": null,
          "max": 13,
          "conditions": "IOUT = 0A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Load Regulation",
          "symbol": "VLOAD",
          "kind": "electrical",
          "unit": "mV",
          "min": 13,
          "typ": null,
          "max": 13,
          "conditions": "VIN = 1.8V, VREFEN = 0.9V, IOUT = 1.8A; VIN = 1.5V, VREFEN = 0.75V, IOUT = 1.5A; VIN = 1.35V, VREFEN = 0.675V, IOUT = 1.2A; VIN = 1.2V, VREFEN = 0.6V, IOUT = 1.2A",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Source Current Limit",
          "symbol": "ILIMITsr",
          "kind": "electrical",
          "unit": "A",
          "min": 1.8,
          "typ": null,
          "max": 3.5,
          "conditions": "VIN = 1.8V, VREFEN = 0.9V; VIN = 1.5V, VREFEN = 0.75V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Sink Current Limit",
          "symbol": "ILIMITsk",
          "kind": "electrical",
          "unit": "A",
          "min": 1.8,
          "typ": null,
          "max": 3.5,
          "conditions": "VIN = 1.8V, VREFEN = 0.9V; VIN = 1.5V, VREFEN = 0.75V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Thermal Shutdown Temperature",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": 125,
          "typ": 170,
          "max": null,
          "conditions": "VCNTL = 5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "REFEN Shutdown Threshold, Enable",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 0.4,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "REFEN Shutdown Threshold, Shutdown",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.15,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Control Voltage",
          "symbol": "VCNTL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": 5,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Control Voltage tolerance",
          "symbol": "",
          "kind": "tolerance",
          "unit": "%",
          "min": -5,
          "typ": null,
          "max": 5,
          "conditions": "VCNTL = 5V ± 5%",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Ambient Temperature Range",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Control Voltage",
          "symbol": "VCNTL",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Reference Input Voltage",
          "symbol": "VREFEN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage",
          "symbol": "VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation, SOP-8 (Exposed Pad)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 2.51,
          "conditions": "TA = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature (Soldering, 10 sec.)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering, 10 sec.",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ESD Susceptibility HBM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "HBM (Human Body Model)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ESD Susceptibility MM",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "MM (Machine Model)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance, Junction to Ambient",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 39.8,
          "max": null,
          "conditions": "SOP-8 (Exposed Pad); natural convection, TA = 25°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Package Thermal Resistance, Junction to Case",
          "symbol": "θJC",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 10.1,
          "max": null,
          "conditions": "SOP-8 (Exposed Pad)",
          "source_page": 5,
          "source": "datasheet"
        }
      ]
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "rt9045gsp"
  ],
  "discovery_pitch": "RT9045GSP (Richtek Tech) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "rt9045gsp.kicad_sym",
    "rt9045gsp.kicad_mod",
    "rt9045gsp.glb",
    "rt9045gsp.step",
    "rt9045gsp-etched.step",
    "rt9045gsp.lbr",
    "docs/hero.png",
    "docs/rt9045gsp-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "RT9045GSP",
      "kind": "packaging"
    },
    {
      "mpn": "RT9045GSPZSP",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T05:18:06.231Z"
}